This is a prime example of why right-wing populism slides so easily into antisemitism. You need a populist framing of "the people" versus "the elites," but you can't frame the elites in strictly economic terms, or else you end up with leftism. Hence you need another way to define "elites."
Miriam Adelson is horrible, but she's horrible because she's a billionaire buying elections. Thomas Massie can't make a principled critique of all billionaires, because that would lead him to leftism, so he has to single out the "Tel Aviv born" ones. He knows exactly what he's doing here.